Granted Patent
Utility
US 4,311,505 · App. 06/202,071
Method of manufacturing glass-lined metal tubes
Inventors:
Tadashi Yasui, Isamu Nakamura, Shigeo Goto
Patented Case
View Patent ↗
Granted: Jan 19, 1982
Filed: Oct 30, 1980
Inventors
Tadashi Yasui
Isamu Nakamura
Shigeo Goto
Assignee (at issue)
Sybron Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.